Nova Patents
US2393091A

System for irrigation

Abstract

This record has no abstract on file.

US2393091A, drawing sheet 1
Sheet 1 of 14

Term

Term ended

Expired 15 January 1963, 63.7 years ago.

  1. Priority and filed
  2. Granted
  3. Expired
  4. Today

10 claims: 10 independent, 0 dependent

  1. 1
    What is claimed is:1. In a system of the character described: a series of liquid discharge means;means for supplying each of said discharge means with liquid under pressure;a series of valves respectively associated with the discharge means for controlling the passage of liquid thereto, said series of valves having at least a first valve and a second valve;means provided for each valve and actuated by the pressure of the liquid for urging the respective valve to closed position;means forming a passage for the liquid under pressure to the means provided for the second valve for urging said second valve to closed position;means responsive to the closing of the first valve for interrupting said passage;means forming a vent port·;said passage being placedin communication with said port by the closing of said first valve to relieve the pressure in said connection to permit the second valve to open;and a device for causing said liquid pressure actuated means for urging the second valve to closed position, to close said second valve substantially immediately upon the conclusion of a limited interval.
  2. 2
    In a system of the character described:a series of liquid discharge means;means for supplying each of said discharge means with liquid <60 under pressure;a series of valve structures respectively associated with said discharge means for controlling the passage of liquid thereto, there being at least a first valve structure and a second valve structure in said series of valve structures, each of said valve structures including a main valve closure, a main fluid pressure cylinder, an auxiliary control cylinder, and a piston in each cylinder;means for causing the pressure of the liquid in the main cylinder of the second valve structure to urge the main valve closure toward closed position;a control valve operated by the piston in the auxiliary cylinder of the second valve structure;means forming a conduit connecting said control valve to the first main valve structure, as well as to the main fluid pressure cylinder for the second valve structure;means forming a vent port;said conduit being so arranged that, when the first main valve structure is open, said conduit is supplied with liquid under pressure;and, when the first main valve structure is closed, said conduit is vented through said port;and means connecting said control cylinder for the second valve structure with said conduit, whereby said control valve, associated with the second main valve structure, operates to connect the main valve cylinder of the second main valve structure to the conduit upon opening of the first main valve structure, so as to permit the second main valve structure to open when the first main valve structure is closed.
  3. 3
    In a system of the character described, a series of liquid discharge valves adapted to operate in sequence and to have a cycle of operation, means for supplying said valves with liquid under pressure, valve mechanism associated with each valve for controlling the discharge of liquid thereby, said valve mechanism including means whereby the liquid pressure from the supply means is effective to close the valve, as well as means to open the valve and means to cause said liquid pressure to close the valve after a limited interval, means to cause the valve of a beginning device to open and initiate a cycle of operation, and means whereby the closing of each valve will relieve the liquid pressure on the valve of the next succeeding device to cause said valve to open.
  4. 4
    In a system of the character described, a series of liquid discharge valves adapted to operate in sequence and to have a cycle of operation, means for supplying said valves with liquid under pressure, valve mechanism associated with each valve for controlling the discharge of liquid thereby, said valve mechanism including means whereby the liquid pressure from the supply means is effective to maintain the valve closed, as well as means to open the valve and means to close the valve after a predetermined interval, means to cause the valve of a beginning device to open and initiate a cycle of operation, means whereby the closing of each valve will relieve the fluid pressure on the valve of the next succeeding device to cause said valve to open, and means whereby the closing of at least one of said valves preceding the end valve, will also relieve the fluid pressure on the valve of a preceding device to cause said last mentioned valve to open, whereby a second cycle of operations is initiated before the termination of the first cycle.
  5. 5
    In a system of the character described, a series of liquid discharge valves adapted to operate in sequence and to have a cycle of operation, means for supplying said valves with liquid under pressure, valve mechanism associated with each 2,893,081 valve for controlling the discharge of liquid thereby, said valve mechanism including means whereby the liquid pressure from the supply means is effective to maintain the valve closed, and means whereby the pressure of the supply means is effective to open the valve upon relief of pressure from the means for maintaining the valve closed, means to relieve said valve from said liquid pressure to permit the valve to open, including means forming a port associated with the valve in the preceding device, and adapted to be opened by the closing of the said valve in the preceding device, and a connection between said port and the means whereby the liquid pressure from the said supply means maintains the said succeeding valve closed.
  6. 6
    In a system of the character described, a series of liquid discharge valves adapted to operate in sequence and to have a cycle of operation, means for supplying said valves with liquid under pressure, valve mechanism associated with each valve for controlling the discharge of liquid thereby, said valve mechanism including a closure, and a piston directly connected to the closure adapted to be actuated to close the valve by the liquid pressure from the supply means, a Pilot valve including a passage to control said pressure on the piston, means forming a port adapted to be controlled by a preceding discharge valve to place the port in communication with said supply means or to permit pressure to be discharged from the port, and a conduit connecting said port and said passage.
  7. 7
    In a system of the character described, a series of liquid discharge valves adapted to operate in sequence and to have a cycle of operation, means for supplying said valves with liquid under pressure, valve mechanism associated with each valve for controlling the discharge of liquid thereby, said valve mechanism including a closure, and a piston directly connected to the closure adapted to be actuated to close the valve by the liquid pressure from the supply means, and means actuated by another discharge valve of said series for controlling the pressure on said piston.
  8. 8
    In a system for irrigation, a series of valves each comprising a single movable closure element, means for supplying each of said valves with liquid under pressure, means whereby the said liquid urges each of the valves to closed position, means operated by the closing of a preceding valve to release said pressure and thereby cause the succeeding valve to open, and means to cause said pressure to close said succeeding valve after a limited interval.
  9. 9
    In a system for irrigation, a series of valves, means for supplying said valves with liquid under pressure, each of said valves including means whereby said liquid is effective to urge the valve to closed position, as well as means to cause the valve to open, means to actuate the opening means of the beginning valve of the series to cause said valve to open and initiate a cycle of operations, in which cycle all the valves are opened and closed, means to cause the liquid pressure to close said beginning valve after a predetermined period of discharge, means operated by the closing of said beginning valve to release the liquid pressure holding the succeeding valve closed, thereby causing said succeeding valve to open, means to cause the liquid pressure to close said succeeding valve after a limited period of discharge, and supplemental means operated by the discharge from one of the valves to terminate the operation of the series after any desired number of cycles.
  10. 10
    In a system of the character described, a plurality of main valves adapted to be serially opened and closed, and controlling the passage of fluid under pressure, each of said valves having a closure, as well as means associated with the closure for urging the closure toward open position, and a fluid pressure operating mechanism associated with each valve, including a pressure operated valve mechanism, a pair of conduits adapted independently to conduct fluid pressure to the respective valve operating mechanism for urging the closure to closed position, each of said conduits being valved, means operated upon the opening of a preceding main valve to close one of said conduits and to open the other, said other conduit having a port controlled by movement of the closure of said preceding valve to admit fluid under pressure to said other conduit only when said closure is in open position and to vent said other conduit when said closure is in closed position, to release the fluid pressure from the operating mechanism of the succeeding valve to permit the succeeding valve to open, and means ensuring the return of the conduits to initial condition upon a completion of a period of discharge of the corresponding main valve. KATHERINE DE LACY-MULHALL·. Administratrix of the Estate of Patrick De LacyMulhall, Deceased.
Independent claims10